Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10653164 | Solid State Communications | 2005 | 5 Pages |
Abstract
The dielectric properties of the [4-NH2C5H4NH] SbCl4 (abbreviated as 4-APCA) crystal were investigated under hydrostatic pressure up to 300Â Mpa. The pressure-temperature phase diagram was given. The paraelectric-ferroelectric phase transition (IIâIII) temperature (Tc) increases linearly with increasing pressure with a slope dTc/dp=21Ã10â2Â K/MPa. The pressure dependence of Curie-Weiss constants has been evaluated also. In the paraelectric phase (II) the Curie constant (C+) was pressure dependent whereas the Câ constant over the ferroelectric phase (III) was almost constant. The results are interpreted in terms of improper and displacive type phase transition model with a soft phonon at a zone boundary.
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Authors
M. Zdanowska-Fra¸czek, R. Jakubas,